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a(1)=1. a(n) = the smallest multiple of {the largest proper divisor of n} that is >= a(n-1).
1

%I #7 Mar 11 2014 01:32:45

%S 1,1,1,2,2,3,3,4,6,10,10,12,12,14,15,16,16,18,18,20,21,22,22,24,25,26,

%T 27,28,28,30,30,32,33,34,35,36,36,38,39,40,40,42,42,44,45,46,46,48,49,

%U 50,51,52,52,54,55,56,57,58,58,60,60,62,63,64,65,66,66,68,69,70,70,72

%N a(1)=1. a(n) = the smallest multiple of {the largest proper divisor of n} that is >= a(n-1).

%Y Cf. A032742, A164528.

%K nonn

%O 1,4

%A _Leroy Quet_, Aug 15 2009

%E Extended by _Ray Chandler_, Mar 15 2010